Difficulty:★★★☆☆
Four-Rail Around — 4th Rail Arrival = Cue Start − 1st Rail Aim
Family 1 · Natural & Long AngleCorner-5 (Five & Half System)
Four-Rail Around
Presets:
Steps:
Club Terms:Four-Rail AroundTứ băng4 băngBốn băng· Four-cushion trajectory used when the 3-rail path is too tight or has a kiss hazard.
3-Second FormulaDiamond System
Cue 50 − 1st Rail 25 = 4th Rail 25
Subtract 1st-rail aim from cue value to get 4th-rail short-cushion arrival.
Cue Tip
2h30 · 3 tips
2:30 running · 3 tips
Thickness
4/8 ball
Half-ball (4/8)
Stroke
Speed 3/5
Smooth follow
Table CompensationLow kiss risk
OB1 clears to opposite half; 3-rail path is kiss-free.· Apply base formula
1st Rail Aim · Tap cell to drawCue Ball Value × 3rd Rail Target
| Cue Ball Value | 10 | 15 | 20 | 25 | 30 | 35 | 40 |
|---|---|---|---|---|---|---|---|
| 40 | — | ||||||
| 45 | |||||||
| 50 | |||||||
| 55 | |||||||
| 60 | |||||||
| 70 | |||||||
| 80 | — | — |
How to play it
Quick Recognition (Four-Rail Around)
Four-cushion trajectory used when the 3-rail path is too tight or has a kiss hazard.
3-Second Key Points
- Formula: 4th Rail Arrival = Cue Start − 1st Rail Aim.
- Table Rule: Subtract 1st-rail aim from cue value to get 4th-rail short-cushion arrival.
- Parameters: Tip 2:30 running · 3 tips · Thickness Half-ball (4/8) · Stroke Smooth follow.
- Kiss Control: OB1 clears to opposite half; 3-rail path is kiss-free.
Table Condition Compensations
- Standard: Apply base formula
- Fast Cloth: Slide longer; aim −4 units
- Slow Cloth: Wider bounce; add +5 units
- Firm Speed: Firm speed delays spin; −3 units
System formula
Băng 3 = Gốc bi chủ − Ngắm Băng 1 (3 típ thuận · mũi 2h30)
The world's foundational 3-cushion diamond system: 3rd Rail = Cue Ball Value − 1st Rail Aim.